Hello Maryam,
That would depend on the type of barre wall bracket hardware being used:
Here are some helpful links:
http://www.alvas.com/barre_adj_brackets_page.html
http://www.alvas.com/wall_mount_adjustable_ballet_barre_installation_ins...
http://www.alvas.com/barre_fixed_brackets_pag...

Hello Melissa,
You sound quite busy and active and I'm not sure adding P90X will be the key.
As you know weight management also has to do with calories in and calories spent.
You might want to look closer at your nutrition and eating habits.
What is your nutrition regiment?
Sincerely,
Michae...

Hello Lisa,
Some great answers given here to a previuos question similar to your question:
http://www.ideafit.com/answers/do-you-feel-comfortable-talking-nutrition...
I think for liablility reasons one should be qualified/certified. However, common sense comes in to play and discussions about...